Pterostylis scabrida
From Wikipedia, the free encyclopedia
| Rough greenhood | |
|---|---|
 | |
| Pterostylis scabrida growing near the Rapid River in Tasmania | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Orchidoideae |
| Tribe: | Cranichideae |
| Genus: | Pterostylis |
| Species: | P. scabrida |
| Binomial name | |
| Pterostylis scabrida | |
Pterostylis scabrida, commonly known as the rough greenhood, is a species of orchid endemic to Tasmania. It has a rosette of leaves at the base of the plant and a single green and white flower on a rough stem. It is widespread and common in wet forests and is one of the few species of Pterostylis to grow in rainforest.
Pterostylis scabrida is a terrestrial, perennial, deciduous, herb with an underground tuber and a rosette of dark green leaves loosely surrounding the base of the flowering stem. Each leaf is 30–60 mm long and 8–10 mm wide. A single green and white flower 20–25 mm long and 14–16 mm wide is borne on a rough flowering stem 80–250 mm high. The dorsal sepal and petals are fused, forming a hood or "galea" over the column. The dorsal sepal is the same length as the petals and curves forward with a pointed tip. There is a wide gap between the galea and the lateral sepals. The lateral sepals are erect and have thread-like tips 14–16 mm long and a slightly bulging, V-shaped notch sinus between them. The labellum is 12–15 mm long, about 3 mm wide, brown and curved and protrudes above the sinus. Flowering occurs from October to February.[2][3]